(a) Compute net sales, gross profit, and the gross margin ratio for each of the four separate companles. (b) Which company has the better gross margin ratio? Complete this question by entering your answers in the tabs below. Compute net sales, gross profit, and the gross margin ratio for each of the four separate companies. Note: Round your gross margin rabo to 1 decimal place, 1.e, 0.2367 should be entered as 23.7%